Hi Rise Bldg

horsegoer

Senior Member
Location
NJ
For a nw constuction hi rise building which the slabs are poured in place are the stairwell landings not poured in place and already pre-cast? Not sure of differeent in NYC than other areas. Thanks.
 

gadfly56

Senior Member
Location
New Jersey
Occupation
Professional Engineer, Fire & Life Safety
The job I'm currently on, the stairs are sub-assemblies dropped in place.
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
Ah, nice pic. TY!!! So running conduit vertically through these stairs requires coring/penetrating?
Yes but it's only a few inches of concrete and the metal pan. For poured concrete stairs we put sleeves in before the pour.
 

horsegoer

Senior Member
Location
NJ
Yes but it's only a few inches of concrete and the metal pan. For poured concrete stairs we put sleeves in before the pour.
So to be clear you only need to cut through the stair landing to set the sleeve? What do you guys use to get through the metal/steel stair landing? Core drill bit.
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
If the concrete is poured we use a core bit, if it isn't a hole saw can be used to cut through the metal before the sleeve is installed.
 

horsegoer

Senior Member
Location
NJ
If the concrete is poured we use a core bit, if it isn't a hole saw can be used to cut through the metal before the sleeve is installed.
In your experience of all the new building you worked in what % is the stair type of the pic you posted?
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
In your experience of all the new building you worked in what % is the stair type of the pic you posted?
I mentioned the difference in post #7. :)

A steel and Q deck building will almost always have metal stairways with concrete fill. A poured concrete building will use formed and poured conrete stairways. I'm guessing that maybe someone makes pre-fab versions but I have never seen them.
 

horsegoer

Senior Member
Location
NJ
I mentioned the difference in post #7. :)

A steel and Q deck building will almost always have metal stairways with concrete fill. A poured concrete building will use formed and poured conrete stairways. I'm guessing that maybe someone makes pre-fab versions but I have never seen them.
Yes, got it.
 
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